/**
 * Software License, Version 1.0
 * 
 * Copyright 2003 The Trustees of Indiana University.  All rights reserved.
 * 
 *
 *Redistribution and use in source and binary forms, with or without 
 *modification, are permitted provided that the following conditions are met:
 *
 *1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license;
 *2) All redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the disclaimer listed in this license in
 * the documentation and/or other materials provided with the distribution;
 *3) Any documentation included with all redistributions must include the 
 * following acknowledgement:
 *
 *"This product includes software developed by the Community Grids Lab. For 
 * further information contact the Community Grids Lab at 
 * http://communitygrids.iu.edu/."
 *
 * Alternatively, this acknowledgement may appear in the software itself, and 
 * wherever such third-party acknowledgments normally appear.
 * 
 *4) The name Indiana University or Community Grids Lab or NaradaBrokering, 
 * shall not be used to endorse or promote products derived from this software 
 * without prior written permission from Indiana University.  For written 
 * permission, please contact the Advanced Research and Technology Institute 
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202.
 *5) Products derived from this software may not be called NaradaBrokering, 
 * nor may Indiana University or Community Grids Lab or NaradaBrokering appear
 * in their name, without prior written permission of ARTI.
 * 
 *
 * Indiana University provides no reassurances that the source code provided 
 * does not infringe the patent or any other intellectual property rights of 
 * any other entity.  Indiana University disclaims any liability to any 
 * recipient for claims brought by any other entity based on infringement of 
 * intellectual property rights or otherwise.  
 *
 *LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO 
 *WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 *NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF 
 *INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS. 
 *INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS", 
 *"VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.  
 *LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR 
 *ASSOCIATED MATERIALS, AND TO THE PERFORMANCE AND VALIDITY OF INFORMATION 
 *GENERATED USING SOFTWARE.
 */
package cgl.narada.util;
 
/**
   $Revision$
   $Date$
*/
public class MessageReader extends Thread {
  
  MessageQueue queue;
  
  public MessageReader(MessageQueue queue) {
    this.queue = queue;
  }
  
  public void run() {
    while (true) {
      if (queue.getSize() == 0) {
	synchronized (queue) {
	  try {
	    System.out.println("Protocol Handler waiting for notification");
	    queue.wait();
	    
	    System.out.println("Protocol Handler waking up");
	    long startTime = ((Long)queue.get()).longValue();
	    long endTime = System.currentTimeMillis();
	    System.out.println("Delay ->" + (endTime-startTime) + "mSecs ");
	  } catch (InterruptedException ie) {
	    ie.printStackTrace();
	  }
	}
      } else {
	synchronized (queue) {
	  long startTime = ((Long)queue.get()).longValue();
	  long endTime = System.currentTimeMillis();
	  System.out.println("Delay ->" + (endTime-startTime) + "mSecs ");
	};
      }
    }
  }

  public static void main(String[] args) {
    MessageQueue queue = new MessageQueue();
    MessageReader reader = new MessageReader(queue);
      reader.start();
    int numOfMessages = 20;
    for (int i=0; i < numOfMessages; i++) {
      queue.put(new Long(System.currentTimeMillis()));
      /*  try {
	  Thread.sleep(1);
	  } catch (InterruptedException ie) {
	  ie.printStackTrace();
	  }*/
    }
  }

}
